18 Florence Terrace, Northland Road, Londonderry

No. 18 Florence Terrace is a mid-terraced Victorian townhouse of three storeys and two bays, built in 1874–75 in the Italianate style. The architect is not known. It forms part of a continuous terrace of five similar houses (Nos. 12–20 Florence Terrace), and also shares group value with the adjoining No. 10 Florence Terrace, which was constructed later in 1890 to a similar form and style. The terrace contributes positively to the Magee Conservation Area, in which it has been included since 2006.

The building has a rectangular plan form, facing south-east, with a three-storey rear return constructed at half-landing height. The exterior is finished in painted render throughout.

The roof is a pitched natural slate covering, continuous with the adjoining No. 20 Florence Terrace. It has black clay ridge tiles, a small dormer centred on the front elevation, a single roof light to the left side, and two roof lights to the right. A large two-stage brick chimney stack with buff clay pots rises from the south-west side, belonging to No. 16. Timber fascia boards and a moulded soffit with paired block modillions are present, along with cast iron rainwater goods to the front elevation.

The front elevation is the architectural centrepiece of the building. To the right-hand side of the entrance door is a single-storey, three-sided canted bay window with segmental arched headed windows, moulded panels below the sill course, a deep moulded cornice, and a parapet above painted in a contrasting colour. All windows are one-over-one double-hung timber sliding sashes with moulded horns. Upper-floor windows have moulded architraves with stop blocks on their sills, and the first-floor windows have keystones. The entrance door is set within a recessed segmental arched headed opening reached by four steps. The door itself is a replacement raised-and-fielded four-panel timber door, flanked by decorative corbel brackets on plain pilasters to either side, which support a deep moulded cornice and a plain fanlight above.

The south-west and north-east sides of the building adjoin Nos. 16 and 20 Florence Terrace respectively. The rear elevation is of rendered painted finish, with a large slated pitched-roof dormer to the main roof and uPVC casement windows throughout where visible. The three-storey rear return, also of rendered painted finish, is built at half-landing height and has square-headed window openings fitted with uPVC casement windows on all levels to the north-west elevation, along with uPVC rainwater goods. The north-east elevation at ground-floor level is abutted by a metal fire staircase, with a door opening onto a rear yard enclosed by a concrete boundary wall. The rear return has a pitched slate roof with black ridge tiles.

The building sits on the north-west side of Northland Road, with a tarmac parking area to the front enclosed by a low rendered painted boundary wall. The front elevation looks south-east across the grounds of Magee University towards the River Foyle.

Historically, the northward expansion of Londonderry had begun in the mid-19th century with the construction of Georgian-style terraces on Great James Street, Queen Street, and Clarendon Street. The Edenballymore and Northland Road area remained largely rural in character when the Victorian terrace at Crawford Square was built in the 1860s–1870s. Economic growth and prosperity from the 1860s through to the end of the 19th century drove significant residential development in the area. The opening of Magee College in 1865 was a particular catalyst, prompting the construction of several new terraces nearby, including College Terrace, Clarence Avenue, and Florence Terrace itself.

Nos. 12–20 Florence Terrace were leased by James Caldwell, a local tea merchant whose business, J. Caldwell & Co., operated from the Strand Road. The adjoining No. 10 Florence Terrace was designed by the local architect and civil engineer William Barker (1851–1898), who was also responsible for one of the red-brick professor's residences on the opposite side of Northland Road, the Bethany Hall on Park Avenue, and the standard design of Aberfoyle Terrace on the Strand Road. It is considered unlikely that Barker designed Nos. 12–20, as these were constructed before he had established his independent practice in the city.

The Annual Revisions Town Plan of approximately 1873–1910 first depicted the terrace in its current layout, with each building including its rear return, suggesting that few structural changes have been made since construction. No. 18 was originally valued at £33 and first occupied by a Mr. Thomas H. Baird. By 1901 the property had passed to a Mrs. Mary Sweeney. In that year the census described it as a first-class dwelling of eleven rooms, with a coal house as its sole outbuilding. The First General Revaluation of Property in Northern Ireland (1936–57) recorded that the terrace was then owned by the McFarland family of Aberfoyle House, and the value of No. 18 had been reassessed at £32. A Mr. Frederick McCullagh occupied the house and purchased it outright in 1954, continuing to reside there until at least the 1970s, during which period its valuation remained unchanged at £32.

The building was listed in 1979. In 1980 it was renovated: the roof was repaired, the sliding sash windows were restored, and the brickwork was repointed. In 1993 the house was converted into a number of self-contained apartments. During this conversion the roof was reslated in natural slate and cast iron rainwater goods were installed. By at least 2012, No. 18 and the adjoining No. 20 Florence Terrace were both in use as student accommodation. As part of that conversion, modern skylights were installed in the roof.